A ghola and commander of the Royal Guard, he is a replication of the original Duncan Idaho, loyal to House Atreides. He grapples with his identity as he repeatedly confronts the current ruler, Leto, and is intrinsically tied to the past and his role as a soldier.

Leto's loyal majordomo and a direct descendant of the Atreides line, he serves as a trusted advisor. He carefully balances dedication to Leto with an understanding of the long-term vision known as the Golden Path.

A rebellious figure and Moneo's daughter, she is resistant to Leto's rule and has unique abilities related to prescience. Her actions challenge the status quo and push against oppressive control.

An ambassador from the technocratic planet Ix and Leto's intended wife, she is a genetically engineered character designed to influence Leto. She embodies innocence and empathy, bringing Leto close to his lost humanity.